The Housing Act 2004 - s7
Category 2 hazards:
powers to take enforcement action
(1)The provisions mentioned in subsection (2) confer power on a local housing authority to take particular kinds of enforcement action in cases where they consider that a category 2 hazard exists on residential premises.
(2) The provisions are—
(a) section 12 (power to serve an improvement notice),
(b) section 21 (power to make a prohibition order),
(c) section 29 (power to serve a hazard awareness notice),
(d) section 265(3) and (4) of the Housing Act 1985 (power to make a demolition order), and
(e) section 289(2ZB) of that Act (power to make a slum clearance declaration).
(3) The taking by the authority of one of those kinds of enforcement action in relation to a particular category 2 hazard does not prevent them from taking either—
(a) the same kind of action again, or
(b) a different kind of enforcement action,
in relation to the hazard, where they consider that the action taken by them so far has not proved satisfactory.